Related Experiment Video
Updated: Jun 8, 2026
13:02
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
Loss-reduced photonic liquid-crystal fiber by using photoalignment method
Ching-Hsiang Chen1, Chun-Hong Lee, Tsung-Hsien Lin
1Department of Photonics, National Sun Yat Sen University, Kaohsiung, Taiwan.
Applied Optics
|September 11, 2010
Summary
We developed a novel method to reduce signal loss in photonic liquid-crystal fibers (PLCFs). This technique uses noncontact photoalignment to improve liquid crystal (LC) orientation, significantly cutting transmission loss for better device performance.
Area of Science:
- Photonics
- Materials Science
- Liquid Crystal Displays
Background:
- Photonic liquid-crystal fibers (PLCFs) are crucial optical components.
- Scattering loss in PLCFs limits their application.
- Controlling liquid crystal (LC) alignment is key to reducing loss.
Purpose of the Study:
- To present a loss-reduced PLCF using noncontact photoalignment.
- To investigate the mechanism of LC orientation and loss reduction.
- To demonstrate the electrical tunability and dynamic response of the photoaligned PLCF.
Main Methods:
- Utilized noncontact photoalignment with azo dye on the capillary surface of a PLCF.
- Combined photoalignment anchoring force with photonic crystal fiber (PCF) boundary conditions.
- Measured transmission loss and evaluated electrical field modulation.
Main Results:
- Achieved a significant reduction in transmission loss from -2.8 to -1.3 dB/cm within 10 minutes.
- Established a permanent, uniform, and highly ordered LC boundary.
- Demonstrated electrical tunability and fast dynamic response of the photoaligned PLCF.
Conclusions:
- The noncontact photoalignment method effectively reduces scattering loss in PLCFs.
- The photoinduced alignment provides a stable and electrically controllable LC boundary.
- This low-loss PLCF technology is suitable for various optical device applications.
